Turbo stuff
- Thread starter JustMe
- Start date
turbo timer
Sorry I can't help you with the BOV, but I can tell you about turbo timers. A turbo timer has several functions, but its main one is to just keep your engine running so your turbo can cool down after a hard run. If you don't give your turbo time to cool it will cause build up and eventually deteriorate. A turbo timer will let your engine run without you sitting in the car for 10 minutes after every drive. It will count down a certain amount of time and then kill the engine. There are several types of timers; some only have the countdown function. I have a HKS timer type 1, and it also has digital speed readouts, 0-60 times, 1/4 mile times, battery level, and few other cool management tools. It cost me about $140, but there are other brands such as Greddy and other models that will go for well under $100. It just depends on if you want just the basics or the fun stuff too.
Hope this helps
Cheers
Sorry I can't help you with the BOV, but I can tell you about turbo timers. A turbo timer has several functions, but its main one is to just keep your engine running so your turbo can cool down after a hard run. If you don't give your turbo time to cool it will cause build up and eventually deteriorate. A turbo timer will let your engine run without you sitting in the car for 10 minutes after every drive. It will count down a certain amount of time and then kill the engine. There are several types of timers; some only have the countdown function. I have a HKS timer type 1, and it also has digital speed readouts, 0-60 times, 1/4 mile times, battery level, and few other cool management tools. It cost me about $140, but there are other brands such as Greddy and other models that will go for well under $100. It just depends on if you want just the basics or the fun stuff too.
Hope this helps
Cheers
K
Keith@FP
A BOV is a bypass valve. Same thing. Prices range from around $50 to much, much more.
Turbo timers are a cool idea, but pretty much pointless in practice. Unless you're in full boost coming in to your driveway, your turbo has already had time to spin down and cool off somewhat. Just drive like a respectable member of society for the last couple of blocks. If you're on the track, let it idle for a minute before shutting down. At the strip, the manouvering you do after a run will probably be sufficient. Water-cooled turbos have even less need for a timer than an oil-cooled one.
Keith
Turbo timers are a cool idea, but pretty much pointless in practice. Unless you're in full boost coming in to your driveway, your turbo has already had time to spin down and cool off somewhat. Just drive like a respectable member of society for the last couple of blocks. If you're on the track, let it idle for a minute before shutting down. At the strip, the manouvering you do after a run will probably be sufficient. Water-cooled turbos have even less need for a timer than an oil-cooled one.
Keith
K
Keith@FP
I believe a dump valve is another term for yet the same thing.
What modifications? An oil cooler always helps. But really, just resist the urge to turn up the boost beyond the design parameters of the kit and keep up your maintenance. That's what's important.
Keith
What modifications? An oil cooler always helps. But really, just resist the urge to turn up the boost beyond the design parameters of the kit and keep up your maintenance. That's what's important.
Keith
slowyellowp5
Member
Most complete turbo kits always have a Blow-off valve (also a pop-off valve, dump-off, whatever) and it is starting to be looked at is more of a necessity and less of a acessory. What it does is lets off extra air (that cool hiss sound) that is created after your throttle plate slam shut (for example in between shifts). If this air is not allowed out it flows backwards to the compressor and causes what's known as compressor surge, something that seriously affects the life of your turbo.
Also, from what I've seen a by-pass (literal meaning is the same thing) is used to describe the type of valve that does the same thing but does not blow off into the atmosphere (blo-off or pop-off) but instead redirects the air back into the intake. This doesn't make the hissing sound, so it is used on all the new factory turbo set-ups, especially by VW (the 1.8t and Audi TT), they work just as well and sometimes better when tuned correctly, but who wants to give up that awesome sound?
But anyway, if you have the money, get the blow-off valve and the turbo timer, in that order...they are both good things to have, if not just for the piece of mind.
Also, from what I've seen a by-pass (literal meaning is the same thing) is used to describe the type of valve that does the same thing but does not blow off into the atmosphere (blo-off or pop-off) but instead redirects the air back into the intake. This doesn't make the hissing sound, so it is used on all the new factory turbo set-ups, especially by VW (the 1.8t and Audi TT), they work just as well and sometimes better when tuned correctly, but who wants to give up that awesome sound?
But anyway, if you have the money, get the blow-off valve and the turbo timer, in that order...they are both good things to have, if not just for the piece of mind.
Very true.... But it never hurts to add to your cars safety. I have a Greddy Full Auto timer-they just came out a few weeks ago. I have yet to install it but it has a buch of other features: Rating the amount of time it takes to shutdown based on MPH, High Rev, and boost level. It also has a bunch of other stuff that confuses me to the point of insanity, but I'm sure I'll get it one day.
K
Keith@FP
Exactly. A BOV (I'm using that term because it's easy to type!) can be vented to atmosphere or recirculated. Since the stock MAF on the Proteg can get confused if air gets dumped to atmosphere after it's been measured, we use a recirculating valve on our kits. Most BOVs will also crack open at idle and let some air in - again, this won't go through the MAF if the BOV isn't recirculated, which can cause idle problems. If your engine runs on a MAP sensor like our Miata kits or many Hondas, you can vent to atmosphere without any ill effects.
Compressor stall will also affect performance - the pressure wave bouncing off the closed throttle plate will slow down the turbo, making it a bit slower to boost after a shift. If the pressure wave is vented off with a BOV, the turbo keeps spinning at a higher speed.
Again, I believe a turbo timer to be just a good way to spend extra money. If you like gadgets, go for it. Otherwise, use a bit of mechanical sensitivity and give your car a couple of blocks to cool down. Your transmission, tires and brakes will appreciate this as much as the turbo.
Keith
Compressor stall will also affect performance - the pressure wave bouncing off the closed throttle plate will slow down the turbo, making it a bit slower to boost after a shift. If the pressure wave is vented off with a BOV, the turbo keeps spinning at a higher speed.
Again, I believe a turbo timer to be just a good way to spend extra money. If you like gadgets, go for it. Otherwise, use a bit of mechanical sensitivity and give your car a couple of blocks to cool down. Your transmission, tires and brakes will appreciate this as much as the turbo.
Keith
Very true, I personally try to stay in vacuum for the last 2 minutes of driving. But turbo times do have a cool factor to them
